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OPA820
  • OPA820
  • OPA820
  • OPA820

OPA820

ACTIVE

Unity gain stable, low-noise, voltage feedback operational amplifier

Texas Instruments OPA820 Product Info

1 April 2026 0

Parameters

Architecture

Voltage FB

Number of channels

1

Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)

5

Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)

12

GBW (typ) (MHz)

280

BW at Acl (MHz)

800

Acl, min spec gain (V/V)

1

Slew rate (typ) (V/µs)

240

Vn at flatband (typ) (nV√Hz)

2.5

Vn at 1 kHz (typ) (nV√Hz)

2.5

Iq per channel (typ) (mA)

5.6

Vos (offset voltage at 25°C) (max) (mV)

0.75

Rail-to-rail

No

Rating

Catalog

Operating temperature range (°C)

-40 to 85

CMRR (typ) (dB)

85

Input bias current (max) (pA)

16000000

Offset drift (typ) (µV/°C)

4

Iout (typ) (mA)

110

2nd harmonic (dBc)

85

3rd harmonic (dBc)

95

Frequency of harmonic distortion measurement (MHz)

1

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

Features

  • High Bandwidth (240 MHz, G = 2)
  • High-Output Current (±110 mA)
  • Low-Input Noise (2.5 nV/√Hz)
  • Low-Supply Current (5.6 mA)
  • Flexible Supply Voltage:
    • Dual ±2.5 V to ±6 V
    • Single 5 V to 12 V
  • Excellent DC Accuracy:
    • Maximum 25°C Input Offset Voltage = ±750 µV
    • Maximum 25°C Input Offset Current = ±400 nA
  • High Bandwidth (240 MHz, G = 2)
  • High-Output Current (±110 mA)
  • Low-Input Noise (2.5 nV/√Hz)
  • Low-Supply Current (5.6 mA)
  • Flexible Supply Voltage:
    • Dual ±2.5 V to ±6 V
    • Single 5 V to 12 V
  • Excellent DC Accuracy:
    • Maximum 25°C Input Offset Voltage = ±750 µV
    • Maximum 25°C Input Offset Current = ±400 nA

Description

The OPA820 device provides a wideband, unity-gain stable, voltage-feedback amplifier with a very-low input-noise voltage and high-output current using a low 5.6-mA supply current. At unity-gain, the OPA820 device gives more than 800-MHz bandwidth with less than 1-dB peaking. The OPA820 device complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input-offset voltage of ±750 µV and an offset current of ±400 nA provide excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage-swing headroom allow the OPA820 device to operate on a single 5-V supply with more than 2-VPP output swing. While not a rail-to-rail (RR) output, this swing supports most emerging analog-to-digital converter (ADC) input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP (0.01% or 0.03°) supports low-cost composite-video line-driver applications. Existing designs can use the industry-standard pinout, 8-pin SOIC package while emerging high-density portable applications can use the 5-pin SOT-23. Offering the lowest thermal impedance of the industry in a SOT package, along with full specification over both the commercial and industrial temperature ranges, provides solid performance over a wide temperature range.

The OPA820 device provides a wideband, unity-gain stable, voltage-feedback amplifier with a very-low input-noise voltage and high-output current using a low 5.6-mA supply current. At unity-gain, the OPA820 device gives more than 800-MHz bandwidth with less than 1-dB peaking. The OPA820 device complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input-offset voltage of ±750 µV and an offset current of ±400 nA provide excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage-swing headroom allow the OPA820 device to operate on a single 5-V supply with more than 2-VPP output swing. While not a rail-to-rail (RR) output, this swing supports most emerging analog-to-digital converter (ADC) input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP (0.01% or 0.03°) supports low-cost composite-video line-driver applications. Existing designs can use the industry-standard pinout, 8-pin SOIC package while emerging high-density portable applications can use the 5-pin SOT-23. Offering the lowest thermal impedance of the industry in a SOT package, along with full specification over both the commercial and industrial temperature ranges, provides solid performance over a wide temperature range.

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